Fisher Space Pen (Pressurized Cartridges) Refills
Pen Refills
ZeroHour
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FISHER SPACE PEN REFILLS
APEX's brass ink cartridge is none other than the patented Fisher Space Pen refill (Medium Black PR4). Nitrogen-pressurized and sealed, with a tungsten carbide ball and stainless steel point, the Fisher cartridge can write in zero gravity, underwater, upside down, over wet and greasy paper, at any angle, and from -30 °F to 250 °F!
We chose the Fisher Space Cartridge as our exclusive ink refill because it’s simply the best and most reliable one ever made. NASA, armed forces, public safety, and outdoor enthusiasts depend on Fisher’s durability, versatility, and thixotropic ink, which writes three times longer than an ordinary ballpoint.
PR refills come in a variety of point sizes and colors. Choose the one that best fits your lifestyle from the options below:
*Note: All fine point refills will come in nickel-silver instead of brass cartridges. Also please note that the product number PR4 and SPR4 are used for the same refill (Black Medium) the only difference is just in the retail packaging/blister card.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.